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POWER_ABK: Stata module to perform power analysis for a balanced (AB)^k design with multiple cases

Author

Listed:
  • Ariel Linden

    (Linden Consulting Group, LLC)

Programming Language

Abstract

power abk computes power, sample size and effect size for tests that compare treatment and control means in a balanced (AB)^k design with multiple cases, using the calculations given in Hedges, Shadish, and Batley (2022). In the balanced (AB)^k design, A refers to a baseline (control or reference) phase, B refers to a treatment phase, and k indicates the number of times (phases) the AB pair is repeated. During each phase, M measurements are taken. For example, (AB)^2 indicates an ABAB design in which 4M measurements are taken on each subject. 2M of these are control measurements and 2M are treatment measurements (i.e., the design is balanced with 2M measurements in each phase). See the PASS Sample Size Software entry for greater detail. Also, the paper by Hedges, Shadish, and Batley (2022) comes with an R program. The results produced by power abk are identical to those produced by the R code.

Suggested Citation

  • Ariel Linden, 2025. "POWER_ABK: Stata module to perform power analysis for a balanced (AB)^k design with multiple cases," Statistical Software Components S459541, Boston College Department of Economics.
    • Handle: RePEc:boc:bocode:s459541
    Note: This module should be installed from within Stata by typing "ssc install power_abk". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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    File URL: http://fmwww.bc.edu/repec/bocode/p/power_cmd_abk.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/p/power_cmd_abk_init.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/p/power_abk.sthlp
    File Function: help file
    Download Restriction: no
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